- PRES Université Lille Nord de France
- PRES Université de Toulouse
- Paracelsus Medizinische Privatuniversität = Paracelsus Medical University
- Parc Euclide
- Parc Naturel Régional des Pyrénées Ariégeoises
- Parc Naturel Régional du Haut-Languedoc
- Parc Naturel Régional du Massif des Bauges
- Paris Descartes Univ, EA Intestinal Ecosyst Probiot Antibiot 4065, Fac Pharm, Paris, France
- Paris Descartes Univ, Risks Pregnancy Dept, Paris, France
- Pennsylvania State University
- PhiLabs
- Philipps Universität Marburg = Philipps University of Marburg
- Pierre Grillet
- Plantum NL
- Polska Akademia Nauk = Polish Academy of Sciences
- Pomeranian Medical University [Szczecin]
- Ponts et chaussées
- Portsmouth Business School [Portsmouth]
- Poznan University of Life Sciences
- Praza Mestra Manuela
- Prince of Wales Hospital Randwick
- Princess Anne Hospital
- Princeton University
- Provincia Autonoma di Bolzano, Agenzia per l'Ambiente
- Public Health Department
- Public Health Department of Gipuzkoa
- Public Health Directorate Asturias
- Public Health Institute of Navarra
- Public health
- Pôle de Recherche Agro-Environnementale de la Martinique